HP_JACK not activated at power-up

[toyshop]

A manual short circuit of pin 3 and 4 reset the HP_JACK audio output. when the short circuit is removed is the audio output activated.
I will now see if I can write an app or a small script to do this (setting / resetting a GPIO pin controlling a analog SW device and thereby make the short circuit)

Have you figured a way to make this work yet? As the audio jack loses connection on reboot or even shutting down and reopening the app using it in Android, I also need to figure a way to keep connection with it without removing and plugging back in to the audio jack. I am trying to use the pine for Square POS instead of a tablet.